Improvement in saw-file guides



E. ROTH. SAW FILE-GUIDE.

No.173,866 l Patented Fe'b. 21,1876.

wnuessml v Inventos.

ATTUBNEYS.

NITED STATEs PATENT FFICE ELIAS ROTH, OF, NEW OXFORD, PENNSYLVANIA.

IMPROVEMENT IN SAW-FILE GUIDES.

Specification forming' part of Letters Patent No. 173,866, datedFebruary 22, 1876; application filed December 11, 1875. l

To all whom it may concern.-

Be it known that I, ELIAS ROTH, of New Oxford, in the county of Adamsand State of Pennsylvania, have invented a new and Improved SaW-FileGuide, ot' which the following is a specification:

In the accompanying drawing, Figure l represents a top view of myimproved saw-tile guide; Fig. 2, a side elevation, partly in section,online c c, Fig. l; Fig. 3, a side view of the indicator for setting thetile to the desired pitch; and Fig. 4, a vertical-transverse section ofthe guiding device on the line a: fr, Fig. 1.

Similar letters o f reference indicate lcorresponding parts.

My invention relates to improvements in saw-tile guidin gap paratus, bywhich each tooth on the saw maybe producedwith the same bevel and pitch,and be reledaceurately at anytime with the same bevel and pitch, 'sothat the saw cuts evenly-and effectively throughout its full length.

The invention consists in 'an adjustable indicator placed on a slidingrod and tile, in order to set the latter to the pitch required for the,teeth.

In the drawing, A represents a straight or aro-shaped clamp of sufcientlength, into which the saw-blade is clamped by means of a vise, screws,or otherwise. The clamp A is provided with longitudinal side grooves a,at some distance below its beveled edges, for the purpose of guiding thebed or frame B, that extends in yoke-shape over the clamp, and

runs, by end studs or rods b, in the grooves a.

rI he bed B supports, by lugs or flangesd at one side, and a set-screw,d', at the opposite side, the graduated ring or circle C, which isreadily adjusted to any angle on the bed by means of an indicator, e, ofthe same, so that thereby the tile may be set to any desired bevel ofthe teeth. A tile-guiding rod, D, passes through diametrical holes ofring O, and carries thele-holdin g arms E,attached adj ustably theretoby clamp-screws f. One of the lesupporting arms E has a ferrule ofsufcieut size to allow the insertion of the tile, which is rigidlysecured thereto at the handle-ferrule by a clamp-screw, g, the other armbeing provided with a socket-hole for the tapering end of the file.

Byloosening the clamp-screw g of the le, the same may be readily turned,so as to give any desired pitch to the teeth of the saw.

An indicating or pointing device, F, with a recess, It, at one end, anda pivoted piece, Ii', with straight lower edge, made adjustable to agraduation at the mainpart, at the other end, is placed on the slide-rodD and the lile, as shown in Fig. 1, andthe lile then turned in the arms,to be acjusted to the inclination of the pivot-piece hf, and givethereby, at all times, a correct pitch to the teeth when either a neviredge of the file is to be used or an entirely new tile inserted.

The guide is applicable to circular as well as straight saws, the clampbeing in the former case of circular shape, and the guide rods or studsof the bed-frame heilig made of arcshape, to slide in the grooves of theclamp.

After the bevel of the teeth is set on the .graduated ring, and thepitch by means ot' the indicator, the clamp-screws are tightened and theteeth tiled at one side. For liling the other side ot' the teeth, thesliding frame is Ataken out ot' the grooves and changed to bring the leto the other side of the saw. The sliding frame is then re-inserted intothe grooves, and thel file set to the same bevel and pitch of teeth asbefore. rlhe lle will then give to each tooth the same bevel and pitchon both sides, producing the effective cutting of the saw throughout itslength.

By pivoting the rod D of tile-frame in the ring O, I am enabled to raisethe front and depress the rear of lile on the forward movement thereof',so as to always cut the forward or cutting-edge of tooth to a greaterbevel than

